Table 3
Pearsons’ correlation coefficient between dust model and the extinction curve parameters c1, c2, c3, c4 of Eq. (2) and RV for various LIPS sub-samples.
| Para. | Sample | c1 | c2 | c3 | c4 | RV |
|---|---|---|---|---|---|---|
| q | S | –0.33 | 0.74 | 0.87 | 0.74 | –0.87 |
| M | –0.61 | 0.65 | –0.51 | 0.05 | –0.45 | |
| LS | –0.47 | 0.39 | 0.26 | 0.11 | –0.42 | |
| L | –0.47 | 0.48 | 0.26 | –0.06 | –0.37 | |
 |
S | –0.31 | –0.12 | -0.83 | –0.79 | 0.89 |
| M | 0.46 | –0.64 | –0.57 | –0.34 | 0.71 | |
| LS | 0.06 | –0.37 | –0.29 | –0.47 | 0.79 | |
| L | 0.06 | –0.50 | –0.32 | –0.39 | 0.69 | |
 |
S | 0.38 | –0.77 | –0.68 | –0.38 | 0.77 |
| M | 0.84 | –0.95 | –0.67 | –0.20 | 0.89 | |
| LS | 0.58 | –0.87 | -0.48 | –0.30 | 0.81 | |
| L | 0.58 | –0.88 | –0.55 | –0.17 | 0.83 | |
 |
S | 0.14 | –0.59 | -0.91 | –0.82 | 0.92 |
| M | 0.67 | –0.81 | –0.64 | –0.18 | 0.68 | |
| LS | 0.41 | –0.54 | –0.39 | –0.27 | 0.67 | |
| L | 0.40 | –0.60 | -0.40 | –0.13 | 0.58 | |
 |
S | –0.94 | 0.87 | 0.12 | 0.09 | -0.32 |
| M | 0.13 | –0.09 | –0.36 | 0.44 | –0.04 | |
| LS | –0.11 | 0.17 | –0.03 | 0.38 | 0.11 | |
| L | 0.11 | 0.08 | 0.09 | 0.53 | –0.13 | |
 |
S | –0.26 | 0.66 | 0.84 | 0.94 | –0.72 |
| M | –0.61 | 0.63 | 0.46 | 0.76 | –0.68 | |
| LS | –0.17 | 0.55 | 0.41 | 0.85 | –0.44 | |
| L | –0.17 | 0.50 | 0.48 | 0.89 | –0.53 |
Notes. Strong correlations or strong anti-correlations are marked in bold. q is the exponent of the dust-grain size-distribution, r+ is the upper radius of large silicates. 
and 
are the mean radius of large silicates and carbon grains, respectively, mvsg∕mlg and 
are the mass ratios of the very small to large grains and of total silicate to carbon, respectively. Samples are defined as follows. – S-sample: single-cloud sight-lines (Table 1; HD 210121 is excluded in the correlation study with extinction parameters but is considered in RV). – M-sample: multiple-cloud sight-lines, including 24 stars of Table 1. The M-sample has a narrower range in the observed extinction characteristics than the S-sample. – L-sample: LIPS objects that are not single-cloud sight-lines, including 51 stars. –LS -sample: targets that are not seen through single-cloud sight-lines (i.e., that belong to the L-sample), but with extinction parameter range similar to the S-sample. This sample includes between 47 and 51 stars.
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